 |
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
|
| If you can't view the Datasheet, Please click here to try to view without PDF Reader . |
|
|
| Datasheet File OCR Text: |
| 19-2473; Rev 0; 5/02 MAX9424 Evaluation Kit General Description The MAX9424 evaluation kit (EV kit) is a fully assembled and tested surface-mount printed circuit (PC) board. The EV kit includes the MAX9424, a four-channel lowskew PECL/LVPECL-to-ECL/LVECL translator. The EV kit accepts differential PECL/LVPECL input signals and converts these differential ECL/LVECL signals at an operating frequency up to 3GHz. The MAX9424 EV kit is a four-layer PC board with 50 controlled-impedance traces. It can also be used to evaluate the MAX9425/MAX9426/MAX9427 PECL/ LVPECL-to-ECL/LVECL translators with different internal input and output terminations (Table 3). Features o Controlled 50 Coplanar Impedance Traces o Output Trace Lengths Matched to < 1mil (25.4 x 10-3mm) o Frequency Range 2GHz (min) at Asynchronous Mode 3GHz (min) at Synchronous Mode o 32-Pin TQFP 5mm x 5mm Package o Surface-Mount Construction o Fully Assembled and Tested Evaluates: MAX9424-MAX9427 Ordering Information PART MAX9424EVKIT TEMP RANGE 0C to +70C IC PACKAGE 32 TQFP 5mm 5mm Note: To evaluate the MAX9425EHJ/MAX9426EHJ/MAX9427EHJ, request a MAX9425EHJ/MAX9426EHJ/MAX9427EHJ free sample with the MAX9424EVKIT. Component List DESIGNATION QTY DESCRIPTION 10F 10%, 10V tantalum capacitors (case B) AVX TAJB106K010R or Kemet T494B106010AS 0.1F 10%, 16V X7R ceramic chip capacitors (0603) Taiyo Yuden EMK107BJ104KA or Murata GRM39X7R104K016A or equivalent 0.01F 10%, 16V X7R ceramic capacitors (0402) Taiyo Yuden EMK105BJ103KW or Murata GRM36X7R103K016AD or equivalent 3-pin headers DESIGNATION R1, R2, R5-R8 R3, R4 R9-R36 IN0-IN3, IN0-IN3, OUT0-OUT3, OUT0-OUT3, CLK, CLK U1 None None None None QTY 6 0 28 DESCRIPTION 49.9 1% resistors (0402) Not installed, resistor (0402) 100 1% resistors (1210), 1/4W C1, C2, C3 3 18 SMA edge-mount connectors C4-C12 9 1 4 1 1 1 MAX9424EHJ (32-pin TQFP 5mm x 5mm) Shunts MAX9424 PC board MAX9424 EV kit data sheet MAX9424 data sheet C13-C21 9 JU1-JU4 4 Component Suppliers SUPPLIER AVX Kemet Murata Taiyo Yuden PHONE 843-946-0238 864-963-6300 770-436-1300 800-348-2496 FAX 843-626-3123 864-963-6322 770-436-3030 847-925-0899 WEBSITE www.avxcorp.com www.kemet.com www.murata.com www.t-yuden.com Note: Please indicate that you are using the MAX9424/MAX9425/MAX9426/MAX9427 when contacting these component suppliers. ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim's website at www.maxim-ic.com. MAX9424 Evaluation Kit Evaluates: MAX9424-MAX9427 Quick Start The MAX9424 EV kit is a fully assembled and tested surface-mount board. Follow the steps below to verify board operation. Do not turn on the power supplies until all connections are completed. 8) Connect a 3.40V power supply to the VBIAS pad. Connect the supply ground to the GND pad closest to VBAIS. 9) Connect CLK and all unused positive inputs (IN0, IN2, IN3) to the VBIAS pad. 10) Connect CLK and all unused negative inputs (IN0, IN2, IN3) to VGG. 11) Turn on the power supplies in the following order: VCC, VGG, VEE, then VBIAS. 12) Enable the pulse generator and verify the differential output signal: a) Frequency = 2GHz b) VOD 400mV c) Duty cycle = 50% Note: To evaluate other channels, make sure corresponding output termination resistors on the EV kit board are removed, and the unused outputs are terminated with a 50 termination resistor. To eliminate signal distortion, use matched cables of the same type and length for both the inputs and outputs. All unused inputs should be biased. Recommended Equipment * Signal generator (e.g., Agilent 8133A 3GHz pulse generator) * 12GHz (min) bandwidth oscilloscope with internal 50 termination (e.g., Tektronix11801C digital sampling oscilloscope with the SD-24 sampling head) * Three power supplies: a) One 2.0V 0.001V with 1A current capability b) One adjustable -3.50V to -0.375V with 200mA current capability c) One adjustable 4.375V to 7.50V with 300mA current capability * Additional power supply (for VBAIS): one adjustable 2.50V to 5.00V with 1A current capability Asynchronous Operation 1) Verify that shunts are across jumpers JU1 (SEL) and JU3 (EN) pins 1 and 2, and jumpers JU2 (SEL) and JU4 (EN), pins 2 and 3. 2) Connect two matched coax cables to OUT1 and OUT1. Connect the other end of the cables to an oscilloscope. 3) Connect two matched coax cables to IN1 and IN1. Connect the other end of the cables to a signal generator that provides differential square waves with the following settings: a) Frequency = 2GHz b) VIH = 3.4V, VIL = 3.2V c) Duty cycle = 50% 4) Connect one coax cable to the trigger output of the signal generator. Connect the other end to the trigger input of the oscilloscope. 5) Connect a 2.000V power supply to the VGG pad. Connect the supply ground to the GND pad closest to VGG. 6) Connect a 5.30V power supply to the VCC pad. Connect the supply ground to the GND pad closest to VCC. 7) Connect a -1.30V power supply to the VEE pad. Connect the supply ground to the GND pad closest to VEE. Detailed Description The MAX9424 EV kit contains an extremely fast, lowskew quad PECL/LVPECL-to-ECL/LVECL translator. The EV kit demonstrates ultra-low propagation delay and channel-to-channel skew, and can be operated synchronously with an external clock, or in asynchronous mode, depending on the state of the SEL input. Power Supply MAX9424-MAX9427 are specified with outputs terminated with 50 to VCC - 2V. In order to terminate the outputs with 50 to VCC - 2V using the 50 oscilloscope input termination, VGG is set to 2.000V. An additional 2.50V to 5.00V power supply is required to bias all unused positive inputs to a known state. All unused negative inputs should be connected to VGG. To avoid damaging the IC, turn on the power supply in the following sequence: VCC, VGG, VEE, then VBIAS. In an actual application, VCC, VGG, and VEE can have different supplies (refer to the MAX9424-MAX9427 data sheet), and VBIAS can be eliminated. Enable and Select The MAX9424 provides pins EN and EN to enable the outputs, and pins SEL and SEL to select asynchronous or synchronous operation. The MAX9424 EV kit incorporates jumpers JU1-JU4 to drive these pins to either VBIAS or VGG (see Tables 1 and 2). 2 _______________________________________________________________________________________ MAX9424 Evaluation Kit Evaluates: MAX9424-MAX9427 Table 1. Jumpers JU1 and JU2 Functions JU1 SHUNT LOCATION 1 and 2 2 and 3 MAX9424 SEL PIN Connected to VBIAS Connected to VGG JU2 SHUNT LOCATION 2 and 3 1 and 2 MAX9424 SEL PIN Connected to VGG Connected to VBIAS MAX9424 OPERATING MODE Asynchronous mode Synchronous mode Undefined All other combinations (not driven externally) Table 2. Jumpers JU3 and JU4 Functions JU3 SHUNT LOCATION 1 and 2 2 and 3 MAX9424 EN PIN Connected to VBIAS Connected to VGG JU4 SHUNT LOCATION 2 and 3 1 and 2 MAX9424 EN PIN Connected to VGG Connected to VBIAS MAX9424 OUTPUTS Enabled Disabled Undefined All other combinations (not driven externally) An external signal can be used to drive any of the EN, EN, SEL, and SEL control pins by removing the shunt completely from the appropriate jumpers and connecting the external signal to the appropriate SMA connector. The MAX9424 EV kit does not provide SMA connectors for EN, EN, SEL, and SEL. Before connecting external signals to the EN, EN, SEL, and SEL pins, verify there are no shunts across jumpers JU1-JU4, and add SMA connectors to the appropriate pads. Evaluating the MAX9425/MAX9426/MAX9427 The MAX9424 EV kit is a four-layer PC board with 50 controlled-impedance input traces with 50 termination (two parallel 100 resistors). All output signal traces are also 50 controlled-impedance traces with 49.9 termination resistors. The MAX9424 EV kit can be used to evaluate the MAX9425/MAX9426/MAX9427 after some modifications. Table 3 shows the on-chip input and output termination resistor arrangement for each part. * To evaluate the MAX9425, replace the MAX9424EHJ with a MAX9425EHJ and remove all output termination resistors R1 to R8. The output is half-amplitude compared to an open output because of the voltagedivider formed by the on-chip series 50 and the 50 oscilloscope input. * To evaluate the MAX9426, replace the MAX9424EHJ with a MAX9426EHJ and remove all input termination resistors R9 to R24. * To evaluate the MAX9427, replace the MAX9424EHJ with a MAX9427EHJ and remove all input and output termination resistors R1 to R24. The output is halfamplitude compared to an open output because of the voltage-divider formed by the on-chip series 50 and the 50 oscilloscope input. Table 3. On-Chip Input and Output Termination PART MAX9424 MAX9425 MAX9426 MAX9427 INPUT TERMINATION RESISTOR Open Open 100 100 OUTPUT TERMINATION RESISTOR Open 50 Open 50 _______________________________________________________________________________________ 3 MAX9424 Evaluation Kit Evaluates: MAX9424-MAX9427 OUT0 SMA R1 49.9 1% IN0 SMA R12 100 1% IN0 VBIAS VBIAS SMA R10 100 1% R9 100 1% C21 0.01F C20 0.01F R11 100 1% VGG C12 0.1F C11 0.1F VEE R13 100 1% R14 100 1% IN1 SMA R15 100 1% 26 IN1 25 IN1 24 VGG R16 100 1% VGG R2 49.9 1% IN1 SMA OUT0 SMA GND 32 VCC C1 10F 10V SEL SMA C4 0.1F VBIAS 1 2 3 JU1 R35 100 1% R36 100 1% 3 R33 100 1% R34 100 1% 4 R31 100 1% CLK SMA R29 100 1% R30 100 1% 6 R27 100 1% R28 100 1% 7 R25 100 1% R26 100 1% 8 5 CLK R32 100 1% 2 1 C13 0.01F IN0 VCC 31 IN0 30 VGG 29 OUT0 28 OUT0 27 VEE GND C19 0.01F C10 0.1F SEL OUT1 23 R3 OPEN OUT1 SMA VBIAS VGG SEL SMA 1 2 3 JU2 SEL OUT1 22 R4 OPEN OUT1 SMA VGG CLK SMA CLK U1 MAX9424 VEE 21 VEE C18 0.01F C9 0.1F C3 10F 10V VEE 20 GND VBIAS EN SMA 1 2 3 JU3 EN OUT2 19 R5 49.9 1% 18 R6 49.9 1% 17 C17 0.01F OUT2 SMA VBIAS VGG EN SMA 1 2 3 JU4 EN OUT2 OUT2 SMA VGG VGG C8 0.1F C2 10F 10V VCC VCC IN3 9 IN3 10 VGG 11 C15 0.01F OUT3 12 OUT3 13 VEE C16 0.01F 14 IN2 15 VGG IN2 16 GND C5 0.1F IN3 SMA C14 0.01F VGG R23 100 1% R24 100 1% C6 0.1F C7 0.1F VEE R17 100 1% R18 100 1% IN2 SMA IN3 SMA R21 100 1% R22 100 1% OUT3 SMA R8 49.9 1% R7 49.9 1% OUT3 SMA R19 100 1% R20 100 1% IN2 SMA Figure 1. MAX9424 EV Kit Schematic 4 _______________________________________________________________________________________ MAX9424 Evaluation Kit Evaluates: MAX9424-MAX9427 Figure 2. MAX9424 EV Kit Component Placement Guide-- Component Side Figure 3. MAX9424 EV Kit PC Board Layout--Component Side Figure 4. MAX9424 EV Kit PC Board Layout--Inner Layer 2 (GND Layer) _______________________________________________________________________________________ 5 MAX9424 Evaluation Kit Evaluates: MAX9424-MAX9427 Figure 5. MAX9424 EV Kit PC Board Layout--Inner Layer 3 (VCC Layer) Figure 6. MAX9424 EV Kit PC Board Layout--Solder Side Figure 7. MAX9424 EV Kit Component Placement Guide-- Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 6 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 (c) 2002 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products. |
Price & Availability of MAX9424EVKIT
 |
|
|
|
|
All Rights Reserved © IC-ON-LINE 2003 - 2022 |
| [Add Bookmark] [Contact Us] [Link exchange] [Privacy policy] |
|
Mirror Sites : [www.datasheet.hk]
[www.maxim4u.com] [www.ic-on-line.cn]
[www.ic-on-line.com] [www.ic-on-line.net]
[www.alldatasheet.com.cn]
[www.gdcy.com]
[www.gdcy.net] |